Holtek HT827A0 Manual page 45

SUB A,[m] Subtract data memory from the accumulator
Description The specified data memory is subtracted from the contents of the accumula-
tor, leaving the result in the accumulator.
Operation
ACC ¬ ACC+[m]+1
Affected flag(s)
TC2
¾
SUBM A,[m] Subtract data memory from the accumulator
Description The specified data memory is subtracted from the contents of the accumula-
tor, leaving the result in the data memory.
Operation
[m] ¬ ACC+[m]+1
Affected flag(s)
TC2
¾
SUB A,x Subtract immediate data from the accumulator
Description The immediate data specified by the code is subtracted from the contents of
the accumulator, leaving the result in the accumulator.
Operation ACC ¬ ACC+x+1
Affected flag(s)
TC2
¾
SWAP [m] Swap nibbles within the data memory
Description The low-order and high-order nibbles of the specified data memory (one of the
data memory) are interchanged.
Operation [m].3~[m].0 « [m].7~[m].4
Affected flag(s)
TC2
¾
TC1 TO PD OV
¾ ¾ ¾ Ö
TC1 TO PD OV
¾ ¾ ¾ Ö
TC1 TO PD OV
¾ ¾ ¾ Ö
TC1 TO PD OV
¾ ¾ ¾ ¾
45
HT827A0
Z AC C
Ö Ö Ö
Z AC C
Ö Ö Ö
Z AC C
Ö Ö Ö
Z AC C
¾ ¾ ¾
March 15, 2000